File Downloaded, but cannot play

Hi, I hope I'm putting this question in the right category.

I downloaded some audio files in mp3 format - some play, while most of them do not ... are they just bad files and I should just try finding other files? I am using Windows media player to play them. They are around 3MB in size, thanks!!!!

I have windows xp on a dell 600m inspiron
No firewalls
almost 30 G left of free space
cable at 100.0Mbps trying to connect from home
no routers
LW 4.18.3
Beijing, China
http://www3.limewire.com:6346/ works

Are you previewing the files during download & if so, do they play then? Which player are you using?
Are you using your AV program to scan files that you've downloaded, before you open them? You should

If you're using LW's player, disable that (tools > options > player) & see whether the songs play when you use another player.

Make sure that you're not downloading infected files.
http://www.gnutellaforums.com/download-upload-problems/84503-new-virus-limewire.html
* WARNING: Viruses on network you should be aware of! *

Check the files with Bitzi. People don't rate music files too often, but if the files are bad people may have rated them to warn other users.
How to use Bitzi